npm start build stuff and is too slow

Nessuno ha ancora preso questa issue.

On a project made with the cli npm start launch the following command:

` "start": "node -r source-map-support/register .",`

This basically clean and build the full project and then start it in a dev mode.

This command can take forever to run. Azure App Service ping app and has a 230 timeout before they shutdown the container. On a small instance, the container will be shutdown before loopback has a chance to start. It's anyway a waste of ressource has Azure run build (in the build process, so no timeout) and then start (in startup script).

I belive npm start should run `"start": "node ./dist/index.js",` instead. A specific command for dev could be introduced such as `"dev": "npm run build && node -r source-map-support/register .",`.

Those are my current scripts:
```
"scripts": {
"build": "npm run clean & npm run copy-files && lb-tsc",
"build:watch": "lb-tsc --watch",
"pretest": "npm run build",
"migrate": "npm run build && node ./dist/migrate",
"openapi-spec": "npm run build && node ./dist/openapi-spec",
"dev": "npm run build && node -r source-map-support/register .",
"start": "node ./dist/index.js",
"clean": "lb-clean dist *.tsbuildinfo .eslintcache",
"copy-files": "mkdir -p dist && cp -r ./backend ./src/data ./dist"
},
```

Inizia dagli script npm del progetto mostrati nell’issue e analizza come viene avviata la CLI dall’output dist generato. Fai in modo che npm start avvii l’entry point generato senza ricompilare, mantieni un comando di sviluppo per il comportamento di build ed esecuzione e verifica che entrambi i comandi mantengano i ruoli previsti.

Scritto dal modello di indicizzazione a partire dal testo della issue.